<!DOCTYPE html>
<html>
  <title>WebGPU canvas_display_after_device_lost (ref)</title>
  <meta charset="utf-8" />
  <link rel="help" href="https://gpuweb.github.io/gpuweb/" />
  <style>
    body { background-color: #F0E68C; }
  </style>
  <canvas id="cvs0" width="20" height="20" style="width: 20px; height: 20px;"></canvas>
  <canvas id="cvs1" width="20" height="20" style="width: 20px; height: 20px;"></canvas>
  <canvas id="cvs2" width="20" height="20" style="width: 20px; height: 20px;"></canvas>
  <canvas id="cvs3" width="20" height="20" style="width: 20px; height: 20px;"></canvas>
  <script>
    function draw(canvas, color) {
      var c = document.getElementById(canvas);
      var ctx = c.getContext('2d');
      ctx.fillStyle = color;
      ctx.fillRect(0, 0, c.width, c.height);
    }

    draw('cvs0', '#66FF00');
    draw('cvs1', '#000000');
    draw('cvs2', '#66FF00');
    draw('cvs3', '#00000000');
 </script>
</html>
